tkinter text控件yscrollcommand
时间: 2023-07-13 18:25:48 浏览: 181
在Tkinter中,Text控件的yscrollcommand选项是用于指定与Text控件垂直滚动条关联的回调函数。当用户拖动滚动条或使用鼠标滚轮滚动Text控件时,回调函数将被调用,以便在滚动时更新滚动条的位置。
以下是使用yscrollcommand选项的示例代码:
```python
from tkinter import *
def scroll_text(*args):
# 通过get方法获取Text控件的y轴滚动位置
y_pos = text.yview()[0]
# 更新Scrollbar控件的位置
scrollbar.set(y_pos, y_pos + 0.1)
root = Tk()
root.title("Text Control Example")
# 创建一个Text控件并设置大小
text = Text(root, width=40, height=10)
text.grid(column=0, row=0)
# 创建一个Scrollbar控件并设置与Text控件绑定
scrollbar = Scrollbar(root, command=text.yview)
scrollbar.grid(column=1, row=0, sticky='NS')
# 设置Text控件的yscrollcommand选项与scroll_text回调函数绑定
text.config(yscrollcommand=scrollbar.set)
# 绑定Text控件的yscrollcommand选项与scroll_text回调函数
text.bind("<MouseWheel>", scroll_text)
text.bind("<Button-4>", scroll_text)
text.bind("<Button-5>", scroll_text)
root.mainloop()
```
这个示例代码中创建了一个Text控件,然后创建了一个Scrollbar控件,并将Scrollbar控件与Text控件绑定。接着,将Text控件的yscrollcommand选项与scroll_text回调函数绑定,这样当用户拖动滚动条或使用鼠标滚轮滚动Text控件时,scroll_text回调函数将被调用。在scroll_text回调函数中,通过get方法获取Text控件的y轴滚动位置,并更新Scrollbar控件的位置,以便在滚动时更新滚动条的位置。
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